People that mostly like their kids and kids in the abstract, but nonetheless want to complain about some aspect of kids (understandably!), may not wish to create the impression that they're not into their kids. So they make sure to include a disclaimer in their complaint that their kids are wonderful, etc.
It's different among close friends -- there you find people complaining that their kids kept them up all night or whatever without feeling the need to include a "my kids are wonderful" every third sentence. Because their close friends know this implicitly.
You're not getting the entire point of Jeff's post if you are saying something like this. If you aren't a parent, fair enough, you simply don't understand. No disrespect intended but this is the truth.
If you are a parent, we should clarify that "unconditional love" doesn't mean no complaints or downsides. Nobody here is suggesting that.
My point is just that it's apparently unacceptable to complain unless it's also tempered with something like, "but it's awesome and great and they're wonderful and it totally outweighs the downsides!" The moment you talk about your children as troublesome without explicitly bringing up all the wonderment and joy and love, you get accused of having mental problems. Bambax presented a view of parenting where the children aren't absolutely wonderful all of the time. He fails to add on the socially mandated "but they're the best thing ever", and as a consequence people start wondering about his mental health, just because he presents a realistic picture of parenting. This, to me, is sick.
Acting like anything short of complete and unconditional love with absolutely no complaints or downside somehow means that there's something wrong with a person just suppresses completely legitimate feelings and makes it difficult for people to figure out how to deal with the inevitable problems and bad parts that will occur.